Officers responded to Webster Street convenience store where a clerk told them a man wearing a blue hoodie and blue bandanna over his face entered the store and approached the counter demanding money.
No weapon was shown, police said.
The clerk turned over an undisclosed amount of money and the robber fled the store on foot, last seen heading south from the 7-Eleven, located at the corner of Webster and Union streets.
The investigation is active and continues, police said. Anyone with information should contact police at 603-668-8711.